Mel... you gave me a great starting point... Since I search that Coolum one, I've found HEAPS of yoga classes (I never found ANY of these when I went searching! Typical! LOL!). Thought I'd post them in case someone else came acroos this search and wanted to know some info!
"Being Yoga" is at Coolum, 8 week class on Saturday mornings 9:15-11:15am. This ones too far for me (bugger!) but you can google it for more info.
"Yoga In Daily Life" centre in Maroochydore has a pre-natal class on every Tuesday 4.30-6pm. Unfortunately the wrong day for me of course! Theres a website you can google for it too.
The class in Buderim is on Saturdays by Jay Campbell, google her name for more info.